Home / 1,448.13-2,172.20-422.13

Finding the Fourth Proportional to 1,448.13, 2,172.20 and 422.13

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Solution

The fourth proportional to 1,448.13, 2,172.20 and 422.13 is: 633.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,448.13 : 2,172.20 = 422.13 : x
  2. Step 2: Convert to fraction form
    1,448.13/2,172.20 = 422.13/x
  3. Step 3: Cross multiply
    1,448.13x = 2,172.20 × 422.13
  4. Step 4: Simplify right side
    1,448.13x = 916,950.79
  5. Step 5: Solve for x
    x = 916,950.79/1,448.13
  6. Step 6: Final answer
    x = 633.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.